Руководство - руководство для начинающих по программированию в среде U90 Ladder (англ.язык)
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1. Enlarge the net as shown on page 28, Figure 45. Enlarging a Net.
2. Place Ladder elements into Net Two as shown in the figure below. To allow the single, one-
shot connection to reset the parallel series of coils, you must connect them.
3. Click on the
Line Draw icon. Connect the contact to the Reset coils.
Figure 56. Reset Conditions
Initializing MI 4
The entered ID number is stored in MI 4 Worker Name List, where it remains until MI 4 is
initialized. If the next worker pushes
Enter on the M90 keypad without entering a number,
the system will grant access based on the previous worker’s ID number.
To avoid this, initialize MI 4 by storing a zero value (0) into it, using:
• One
Store Direct function block.
You can include this function block in Net 2, together with the Reset Coils,.
1. Select the Store Direct function block from the Store menu as shown below.
Figure 57. Store Direct
2. Place the function block as shown in Figure 58. The Select Operand and Address box
opens.
3. Enter a value of ‘0’ for the ‘
A’ value, and MI 4 for the ‘B’ value. The complete net appears as
shown below.
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Figure 58. Initializing the Counter
Net 2 now reads:
WHEN MB 30 is ON, THEN turn ON Reset Coils MB 10, 11, and 12, AND store 0 into MI 4.
Inserting a ‘Comment’
U90 Ladder offers a Comments feature that allows you to store notes in your program.
1. Click on the Insert Comment button. Your cursor turns into a cross-hairs.
Figure 59. Insert Comment
2. Click in Net 1. A Comments field opens at the top of the net, allowing you to type text.
Figure 60. Enter Comment
You can download and test your project. Keep in mind that, because you have not yet
formatted Display 4, pressing
enter after Display 3 Welcome _______ will bring up a blank
screen. Use the
Debug feature to reset SI 2 Current HMI Display to 1.
Downloading a project
Before you can download a project, the M90 must be connected to a power supply and to
your PC. Refer to the M90 User Guide for instructions.
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1. Click the Download button as shown below. The Download box opens.
Figure 61. Debug
2. Click OK. The Download process begins. When it is complete, Enter ID no.__ is displayed
on the M90 screen—providing you have followed directions exactly as given..
To learn more about downloading and related features, check U90 Ladder’s help.
Testing Your Project: Debug
If you test your project now, the Jump to Display 4 will show a blank screen. You can reset
the program “on-line” using the
Debug mode.
1. Click the arrow next to the Debug button; then select Full M90 OPLC View.
Figure 62. Debug
2. The net power flow appears in red and a live representation of the M90 appears on your
screen. The current value of activated Ladder elements are displayed over the yellow Operand
fields.
3. In Net 1, click on the function block’s ‘
A’ Operand field, the Send Value box opens as
shown below.
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Figure 63. Using Debug
4. Enter 1 in the New box and click Send.
The new value ‘1’ appears above the Operand field, the power flow through the net
changes, and
Display 1 Enter ID no.__ is shown both on the connected M90 and the
graphical M90 representation on screen as shown below.
Figure 64. Send Value
5. Click the Debug button to exit Debug mode.
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Displays: Entering Parameters
Once an operator’s password is approved, the operator sets system parameters using the
M90 keypad. In this section, you create a series of Displays. These displays lead the
machine operators through the process of:
• Setting the number of boxes per bundle. The maximum number of boxes per bundle is 99.
• Setting a start time and an end time for system maintenance, during which the bundling
machine cannot run.
Display 4: Set Box Quantity
Display 1 contains:
•
Fixed text.
• A
Keypad-Entry Variable.
Editing Display 4
1. Open the HMI editor; then open Display 4 by clicking it in the Project Navigation tree.
2. Name it
Set Box Quantity, by typing the name in the title bar, then pressing Enter. The title
appears in the Project Navigation tree as shown in Figure 67.
Figure 67. Naming a Display
3. Enter the fixed text Set Box Q’ty. in the green Display field as shown below.
Figure 68. Creating a Text Message
To allow the operator to set the number of boxes per bundle, you link a Variable to the
Display. The Variable will contain a number entered from the M90 keypad. Since the
maximum number of boxes per bundle is 99, create a field that can hold two digits.
Creating a Field
1. Click your cursor in the display. This is the starting point of the field.
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2. Create the field by dragging the cursor across the display. The field is highlighted in blue.
Figure 69. Selecting Variable Space
Attaching a Variable
1. Click Attach Variable on the toolbar. The Attach Variable dialog box opens.
2. Enter
VR 5 Set Box Quantity; then press OK as shown in Figure 70.
Figure 70. Enter Variable Number and Address
Display 4 shows the Variable-linked spaces as red pound signs. You have attached a
Variable to the Display. Now format the Variable to accept a number that the operator
enters from the M90 keypad.
Formatting a Keypad-Entry Variable
This Variable will accept a two-digit number between 1 and 99.
1. Open Variable 5 by clicking it in the Project Navigation tree.
2. Select
Integer from the Variable Type list; the Set Link to Int box opens.
3. Enter MI 11 Set Box Quantity as shown below; then click OK.
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Figure 71. Linking an MI to a Variable
The Variable is now linked to MI 11. You will format MI 11 later.
4. Select Keypad Entry from the Variable Information list.
5. Select
Start with Clear Field. If you do not select Start with Clear Field, the last number
entered in MI 11 will be displayed.
6. Select
Enable Limits. In the Min box, enter 1; enter 99 in the Max box. When you are
finished formatting Variable 5, the screen looks like the figure below.
Figure 72. Formatting an Entry Variable
Setting a Jump Condition
After an operator enters the number of boxes per bundle (s)he presses the Enter key. Use
this as the Jump condition.
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1. Open Display 4 by clicking it in the Project Navigation tree.
2. Click on the first
Jump condition. The Define Jump to Condition box opens.
3. Enter
SB30 Keypad entries complete, as shown in Figure 73.
Figure 73. Defining a Jump Condition
4. Click OK. The Define to Display Jump box opens.
5. Enter
DS 5 Enter Start Time as shown below.
Figure 74. Defining the Jump Destination
6. Click OK. The Display now contains the linked Variable and Jump condition as shown
below.
Display 5 Enter Start Time appears in the Project Navigation tree.
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Figure 75. Completed Display
The complete Display shows the Jump Condition and the destination Display. When an
operator enters a number and presses
Enter, the M90 will show Display 5 on its screen.
Display 5: Start TimeDisplay 5 contains:
•
Fixed text.
• A Keypad-Entry Time Variable
Editing Display 5
1. Open Display 5 by clicking it in the Project Navigation tree.
2. Enter the text
Start Time:____ in the green Display field, as shown below.
Figure 76 Display 5: Start Time
Creating a Field and Attaching a Variable
1. Select 5 spaces in the Display text.
2. Click
Attach Variable. The Attach Variable box opens.
3. Enter
VR 2 Start Time; then press OK. Display 5 shows the Variable-linked spaces as red
pound signs as shown in Figure 77 below. Now, format the Variable.
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Figure 77. Display 5 with Attached Variable
Formatting a Keypad-Entry Time Variable
This Variable will hold the Start Time that is entered by the operator via the M90 keypad.
1. Open Variable 2 by clicking it in the Project Navigation tree.
2. Select
Time Functions from the Variable Type list. The Set Link to Time Function box
opens.
3. Enter
MI 2 Start Time; then click OK as shown below. Variable 2 is now linked to MI 2. You
will define MI 2 when you write the Ladder program for Maintenance Time.
Figure 78 Linking a Variable
4. Select Hour (CT) and Keypad Entry from the Variable Information list as shown below.
Figure 79. Defining a Time Variable